Pincher Creek is the largest wet condensate gas field in Alberta. It is located approximately 100 miles south of the International border, and 25 miles east of the B. C. border in the foothills. Much of the area is of low relief, covered with glacial till, with Bedrock of Cretaceous age outcropping along rivers and creeks. Due to thrust faults the Belly River formation, the Alberta group and the Blairmore formation have been repeated four times. The Kootenay (Lower Cretaceous) and Fernie (Jurassic) do not show repetition in wells drilled to date. The entire series from Belly River to Fernie is almost entirely composed of alternating beds of shales and sandstones.

The Rundle formation of Mississippian age comprises the main reservoir rock which is composed of competent limestone and dolomitic rocks, and is encountered at a depth of approximately 8,000 to 12,000 feet.

The major regional tectonic structures of the Pincher Creek area are the Lewis Overthrust, Front Range Thrust, Eastern Thrust and the Alberta Syncline.

The reservoir is approximately 18, 900 acres with an average total thickness of 520; average porosity ranges from 2.6 to 7.4 per cent; calculated reserve 3.1 trillion cubic feet (2.29 marketable gas). The field will produce dry gas, natural gasoline, ethane, propane, butane and sulphur. It is a potential source of ethylene oxide or ethyl-alcohol.

Abstract by E. Burton, P & N G Conservation Board

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